Door-lock and door-switch for electric elevators.



R. BRENNE. nona LUCK AND 000e SWITCH FOR EiECHIC ELEvAoRs.

APPUATN LE ULLZ, 1515. 1,209,637. Patented Dee. 19, 1916.

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DOOH LOCK AND'DOOR SWITCH FOR ELECTRIC ELEVATORS.

APPLICATION FILED AUG.26. 1915.

UNITED -STATES PATENT OFFICE.

RICHARD BBENNE, 0F CHICAGO, ILLINOIS, ASSIGNOR T0 KAESTNEIE HCHT COM- ,PANY, OF CHICAGO, ILLINOIS,

A CORPORATION 0F ILLINOIS.

DOOR-LOCK AND DOOR-,SWITCH FOR ELECTRIC ELEVA'I'ORS.

Speoication o! Letters Patent.

Patented nec. 19, 191e.

Application tiled August 26, 1915. Serial No. 47,548.

sto automatically at any desired licor. At

eac floor is provided a door by means of which persons'nay enter and leave the car. Each doorI is normally locked.

One of the objects of this invention is to provide improved means for preventing a person from unlocking any of the doors ex-` cept the door at the Hoor to which the car is destined, and for preventing the lock of the last mentioned door from being operated until the car has stop ed moving. Y

Another object of the invention is to provideimproved means for disabling the motor-controlling mechanism when any one of the doors is` opened, in order to prevent the car from being started while a door is open. In the .accompanying drawings, Figure 1 isadiagrum illustrating one embodiment of my invention. Fig. 2 is a detail view of the `door-,locking means. Fig. 3 is a sectional view taken approximately in the plane of dotted -line 3 3 of Fig. 2.

yFig'll indicates three floors of a building. Each 'floor is provided with a sliding door 1 opening into the elevator shaft. The elevator car is not shown.

2 denotes a controller by means of which the motor '(not shown) is started and stopped. This controller may be of any .suitable character, as, for example, that shown in Patent No. 1,100,134, dated June 16, 1914. `The motor is suitably connected to ahoisting drum 3 by means of which the elevator car is raised and lowered.

v Each of the, doors l is provided with a loclrfcomprlsipg a hand lever 4 having a handle 5, at, item per end. Intermediate its Y ends `the lealy F y 1s pivoted to a vertical arm 6 which isdn! ted, at i" to the door. Rigid with thearlnmisfaflatch adapted to pass through anopeningpg in. a' lock casing 10 which is fixed to the door jamb. When in operative position the hook et the latch 8 lies behind the portion 11 of the lock casing. A spring 12 normally holds the latch .8 1n the position shown in ig. 2.

The meansfor preventing the latch 8 at any given floor from being swung upwardl out of engagement with the portion 11 until the car has arrived at the given floor and has come to a stop comprises a member 13 having a chamber into which the free end of the latch 8 may extend, the member 13 being vertically slidable in guides 14 in the.

lock casing 10.

A spring 15 tends to raise the member 13, the upward movement of said member being limited by impingement against the part 16.V

Upon the member 13 are formed one or more locking teeth 17 arranged to be engaged by a dog 18 pivoted at 19 inthe lock casing 10., Ri d with the dog 18 is an arm 20 which vis yie dingly connected to the stem 21 of an armature 22, said armature being arranged to be lifted by an electromagnet 23.v One terminal of the electromagnet 23 is'connected 'to a wire 24 which is connected to a source of constant supply of electric current. The other terminal of the electromagnet 23 is connected by means of a. wire 25` to the pole 26of a switch 27 in the lock casing 10. The other pole 26 of the switch 27 is connected by means of a wire 28 to a suitable circuit-closer associated with the door-stop device. To distinguish between the wires 28 at the different lioors, said wires are indicated in the diagram as 28, 28", '28". VA circuit may be closed across the contacts 26 and 26a by ay contact 29 which is secured to .a plunger 30. A s ring 31 normall holds the contact 29 out o? engagement wi h the contucts26 and 26". To tbelower end of the hand lever 4 is pivoted a push in 32 which entends through a guide 33. he push pin 32 is arranged to bear against the plunger '30. When the upper end of the hand lever 4 is swung 'toward the right (Fig. 2), the push pin 32 will pressed against the plunger'lO, whereby the contact 29 willbe moved into engagement with` the contacts 26 and 26. If the car be standin still at the floor at which the given hand Aver 4 is located, a circuit will be closed (by the circuitcloser associated with th:` Hoor-stop device) through the electromagnet 23 and the armasiti on to ture 22 will be raised, thereby withdrawing the dog 18'from engagement with the mein,- ber 13. Continued pressure on the handle 5 (toward theright, Fig. '2) will cause the latch 8 to swing upwardly, the member 13 being raised by the spring 15. As soon` as the latch 8 isc e n tinued pressure on the handle 5 will cause the door to open. As theV door isbeing opened the'push pin 3'2 recedes from the 37 is an electric contact in the insula-tilngV piece 36. The contact 37 1s connected in .any

suitable manner to a wire 38 which extendsto one pole of a switch communicates with the source of constant supply of electric current. The switch 39 is normali closed. When the controller 2 -is actuate to close the motor circuit, said controller opens the switch 39. This may be accomplished in any suitable manner; herein is diagrammatically shown a slidable mem ber 39 which is engaged by the controller switch member 2* and moved to swing the movable element of the switch 39 away from the stationary elements of said switch.l

The wiresl 23, 28 and 23" extend to stationary contacts 28', 28 and 28'", respectively. These contacts are arranged in pobe engaged by the movable contact 37. "hen the car is level with Vthe first floor, `,the con-tact 37 is in enga ment with Vthe contact 2S. Whenthe car is level with the second floor, thecontacts 37 and 28" are in engagement, and when the car is at the third Hoor the contacts 37 and 28"' are in engagement.

t will be seen that the latch 8 at any given Hoor cannot be disengaged from the ortion 1'1 until a circuit has been completed t rough the electromagnet -23 at three different points,

unamely, the switch 27. the Hoor-stop con- Itact 37 and the contact corresponding to the given floor, and the switch 39. Since the switch 39 is open when the motor is running, and since the contact 37 does not engage the proper contact except when the car is at the given licor, it will be seen that the car must be standin stili at the given Hoor before the door can )e unlocked. In the diagram the car is presumed to be standing at the third floor.

In the operation of closing the door,A the beveled surface 8 of the latch 8 strikes the a'r of the portion 11 the conpiece of e portion 11 and is said ortion 11, enterin the member r13. As soon as the hook o the latch has passed the portion 11 the spring 12 pulls the hook down behind the portion 11, and also pulls the member 13 down into normalposition. The springl-Z is stronger than the spring 15.

The means for preventing the car from being started while any door is open, comprises thereby raised to pass over a switch 41 at each tloor, said switches bef is open the car cannot be, started. y 39. The other pole ofV said switch is-connected to a wire 40 which As will be readily understood, the door the latch at the same time ,i

2 cannot be operated to lock and door switch herein disclosed areadapted for use in electric elevators., of o 1er types than the automatic push-button t pe.

I claim as my invention: 1. An elevator system having, in combination, a door-lookin member, a handle for operatin said mem er a lock for said member, an e ectromagnet for operating the lock. a circuit for the electromagnetya switch in saidcircuit `arranged to be closed by said handle, a controller, a switch in said circuit arranged to be opened 4by the controller, a hoisting drum, and a circuit-closer operated by the drum and included in said circuit.

2. In an elevator system, a pivoted latch,

a casing having a portion adapted to be engaged by the latch,`a member chambered4 to receive theend of the latch, said member being movable in said casing, a spring tending a switch in said circuit, a hand lever for disengaging the latch from the casing, a memL ber connected to the hand lever for closin the switch, and a spring fol-moving the late 1 into en aging position, the last mentioned spring icing stronger than the other spring. Iritn elevator system, a pivoted latch. a casino' having a portion adapted to be engaged5 by the latch, a memberchambered to receive the end of the latch, said member being movable in said casing, a. dog arranged to lock said member, an electromagnet for withdrawing'the dog, a circuit for the electromagnet, a switch in said circuit, a hand lever for disengaging the `latch from the casing, and a member connected tothe hand lever for closing the switch.

4. An elevator Isystem having, in combination, a door jamb, a door, a door-locking member on the door, a handle for operating said member. and for moving the door, a lock for said member on the door jamb, an elcctromagnet for operating the lock, a circuit for the elmetromagnet. and a switch on the door'jamb, said switch being included in said circuit and being arranged to be closed by said handle.

An elevator System having, in combination, a door-locking member, a member associated therewith, a loch for said doorlocking member.` an electromagnet for operating the lock, a circuit for the electromagnet, a normally open switch in said circuit adapted lo be closed by said associated member, a controller, and a normally closed switch in said circuit arranged to be held open by the controller while the motor is running.

fl. A11 elevator system having, in combination, a door-locking member, a lock for said member, an clectromagnet for operatinar the lock, a circuit for the electromagnet, a lioistinp,` drum` a circuit-closer operated b vthe drum and included in said circuit, aV part for operatingr said door-locking member. and a .second circuit-closer included in said circuit and operable by said part.

T. An elevator system having, in co|nbi nation, a door-locking member, a han le for operating .said member, a lock for sai member, an electromagnet for operating the lock, aeircnit for the eleetromagnet, and a switch in said circuit arranged to be closed by said handle` 8. An elevator system having, in combination, a door jamb, a door, a switch on the door jamb which is normally open when the door is closed, a handle on the door for openingr the door, and a switch-operating member mounted to travel with the door,

said member being movable by the handle to close the switch.

9. In an elevator system, a, pivoted latch, an arm connected to said latch, a lever pivoted intermediate its ends to said arm, a handle on one end of said lever, and a switch-operating member on the other end of said lever.

10. In an elevator system, a pivoted latch, an arm` extending upwardly from `the pivoted center of said latch, a lever pivoted intermediate its ends to said arm, a handle on the upper end ot' said lever, and a switchoperatirrgr member on the lower end of said lever.

11, A,n elevator system having, in combination, a door locking member, a lock for said member, an electromagnet for operating the lock, a circuit for the electromagnet, an independent circuit, a controller in said independent circuit, a normally closed switch in said electromagnet circuit `arranged to be held open by the controller when said independent circuit is alive, and a switch in said independent circuit arranged to be closed by said 'oer locking member whereby said controlli. :nay open said normally closed switch.

12. An yelevator system having, in combination, a door-locking member, a member associated therewith, a lock for said doorlocking;r member` an electroniagnet for operating the lock, a circuit for the electromagnet, a switch in said circuit adapted to be closed by said associated member, a controller, and a switch in said circuit arranged to be opened by the controller.

In testimony whereof, I hereunto set my hand in the presence of two witnesses.

RICHARD BRENNE. In the resence of J. MITCHELL,

H. W. BALFANZ. 

